Brake fluid is one of those maintenance items that is often postponed because the symptoms do not appear immediately. In reality the fluid ages over time and absorbs moisture, which reduces reliability.
If the fluid contains too much moisture, braking under heavier heat load can become less stable. You may not notice it in everyday driving, but in a harder stop the difference can matter a lot.
Many manufacturers recommend changing brake fluid roughly every two years. The exact interval depends on the car and how it is used, but time-based maintenance makes perfect sense here.
If you do not remember when the brake fluid was last changed, record it in the service history the next time it is done. That way the next change does not depend on guesswork.